New dyestuffs of the diamino-triphenymethane series



Patented Sept 13, 1932 UNITED STATES PArE NT *oFFIcE.

OTTOIBOGER, OF DESSAU' IN ANHEIM, AND OSWALD .MEISSNER,. OF UERDINGEN-ON- THE-RHINE, GERMANY, ASSIGNORS, BY MESNE ASSIGNMENKKS, 'IO GENERAL ANI- LINE WORKS, INC., OF NEW YORK, N. Y., A CORPORATION OF DELAWARE NEW DYESTUFFS 01E THE DIAMINO-TRIPHENYMETHANE SERIES No Drawing. A lication filed April 3,1928, Serial No. 267,130,- and. in Germany A rnea eam The condensation of benzaldehyde-disulphonic acids with dimethyh, diethylr dibenzyl-derivatives of amino-benzene or monomethyl-, monoethylor monobenzyl-deriva- 51l3lV6S of Q-amino-l-methylbenzene yields blue dyestufl's of equalizing properties and fast to alkali.

By the present invention new blue dyestuffs of Very good equalizing p-roperties,fast

to alkali and of considerably greater coloring power than those referred to above, are made by condensing a benzaldehyde disulphonic acid with an N-alkylated aryl-amine, the alkyl-group containing at least three carbon atoms. Such alkyl-aryl-amines are made, for instance, by interaction of an aryltane.

The free acids of the dyestuffs may be represented by the general formula:

R meaning an aromatic radicle of the benzene series, B meaning the'radicle of a benzene disulphonic acid and n standing for a whole number greater than 2. Y

In the dry shape of their sodium salts the new dyestufis are dark powders soluble in water with a blue color and dyeing wool blue 40 tints distinguished by uniformity and by remarkable clearness and beauty, even in artii dized in the known manner by means of poamine with Z-chloropropane or 2-chlorobu-' tassium bichromate in presence of oxalic acid and sulphuric acid. By salting out there are 7 obtained 57.4 parts. of a 'dyestufi free from salt, which dye'wo ol and silk as strongly as double its weight of'the corresponding dyestuff from benzaldehyde 2.4-disulphonic acid and 2 monoethyl'amino 1 -methyl-benzene dyes wool and silk. i The dyestufi is a salt of i an acid which maybe represented by the formula CH: CH;

' HaO SO'H CH3.

1. The new.- dyestufis of the diamino-triphenylmethane series being salts of an. acid represented by the generalformula;

R meaning an aromatic radicle of the benzene series, B meaning the radicle of a benzene disulphonic acid and n standing for a whole number; these dyestuffs in the shape of their dry sodium salts being dark powders soluble in water with a blue color and dyeing wool blue tints. V

2. The new dyestuffs of the diamino-tri- .phenylmethane series being salts of an acid represented by the generalformula:

HO; on,

kH-HN-M) R (1)C-(1) R (4)--NH H v on mo L, GHa-OH:

R meaning an aromatic'radicle of the benzene series and R meaning the radicle of a benzene disulphonic acid; these dyestuffs in the shapeof their dry sodium salts being dark powders soluble in water with a blue color and dyeing Wool blue tints.

3. The new dyestufis of the diamino-triphenylmethane series being salts of an acid represented by the general formula:

R meaning an aromatic radicle of the ben- I zene series, 72 meaning a whole number these dyestufis in the shape oftheir dry sodium 5 salts being dark powders soluble in water with a blue color and dyeing wool blue tints. V 4. The new dyestufi of the diamino-triphenylmethane series being a salt of an acid represented by the following formula: 7

H. i soar g 01H this dyestufi in the shape of its dry sodium salt being a dark powdersoluble in water with a blue colorand dyeing woolblue tints.

5. The new dyestufl" of the diamino-triphenylmethane series being a salt of an acid represented by the following formula:

om-oHrdH-nN OH I 7 a angels-NH J-QNH-OlL-OH:

m0 SOzH H1 V HO=S I 7 40 this dyestufi in the shape of its dry sodium salt being a dark powder soluble in water with a blue color and dyeing wool blue tints.

In testimony whereof, we aflix our signatures. V

45. OTTO BOGER.

OSWALD MEISSNER. 

